/* ==========================================================================
   iFold — site styles
   Sections: tokens & reset · nav · hero · intro · playground · details ·
   real-world · get · footer · dialogs · 404 · responsive · reduced motion
   ========================================================================== */

/* --------------------------------------------------------------------------
   Tokens & reset
   -------------------------------------------------------------------------- */
:root {
  color-scheme: light;
  --paper: #f5f5f7;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --accent: #0f7f8c; /* deep teal — echoes the wallpaper, deliberately not Apple's blue */
  --accent-hover: #0b6d78;
  --line: #d8d8dc;
  --focus: #1a9bab;
  --dark-surface: #101113;
  --dark-control: #252629;
  font-family: "Helvetica Neue", Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
}

body.modal-open {
  overflow: hidden;
}

::selection {
  background: #bfe6ea;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  border: 0;
  cursor: pointer;
}

button,
input {
  font: inherit;
}

button,
a {
  touch-action: manipulation;
  outline-offset: 6px;
}

button,
input,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid var(--focus);
}

/* Shared type */
h1 {
  font-size: clamp(58px, 6.3vw, 92px);
  letter-spacing: -5px;
  line-height: 1.01;
  margin: 0;
  font-weight: 600;
}

h2 {
  font-size: clamp(42px, 4.9vw, 72px);
  letter-spacing: -3.1px;
  line-height: 1.06;
  font-weight: 600;
  margin: 0;
}

h3 {
  font-size: 23px;
  letter-spacing: -0.6px;
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 16px;
}

.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  margin: 0 0 23px;
  color: #77777d;
  line-height: 1.6;
}

.section-pad {
  padding-left: max(7vw, 24px);
  padding-right: max(7vw, 24px);
}

/* Buttons */
.button {
  background: var(--accent);
  color: white;
  border-radius: 40px;
  padding: 16px 25px;
  display: inline-flex;
  gap: 22px;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition:
    background 0.2s,
    transform 0.2s;
}

.button:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

.button.small {
  font-size: 13px;
  padding: 10px 17px;
  gap: 16px;
}

.text-button {
  padding: 0;
  background: none;
  color: var(--accent);
  font-size: 17px;
}

.text-button span {
  margin-left: 12px;
}

.skip {
  position: fixed;
  top: -100px;
  left: 20px;
  background: white;
  padding: 16px;
  z-index: 99;
}

.skip:focus {
  top: 10px;
}

/* --------------------------------------------------------------------------
   Nav
   -------------------------------------------------------------------------- */
.nav {
  height: 76px;
  max-width: 1280px;
  margin: auto;
  padding: 0 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 10;
  border-bottom: 1px solid #d9d9de80;
}

.brand {
  font-size: 25px;
  font-weight: 650;
  letter-spacing: -1px;
  display: flex;
  gap: 9px;
  align-items: center;
}

.brand svg {
  width: 31px;
  height: 31px;
}

.nav nav {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 13px;
  font-weight: 450;
}

/* --------------------------------------------------------------------------
   Hero — sticky stage; the lid closes as the section scrolls by
   -------------------------------------------------------------------------- */
.hero {
  height: 190vh;
  min-height: 1200px;
  position: relative;
}

.hero-sticky {
  height: calc(100svh - 20px);
  min-height: 760px;
  max-height: 1100px;
  position: sticky;
  top: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.hero-copy {
  text-align: center;
  padding-top: 42px;
  position: relative;
  z-index: 2;
  pointer-events: none;
  will-change: transform, opacity;
}

.hero-copy .eyebrow {
  margin-bottom: 23px;
}

.tiny-fold {
  font-size: 16px;
  vertical-align: -1px;
  margin-right: 7px;
}

h1 span {
  background: linear-gradient(100deg, #2676be, #57a2b7 78%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-copy > p:not(.eyebrow) {
  font-size: 19px;
  line-height: 1.45;
  margin: 20px 0 0;
  color: var(--muted);
  letter-spacing: -0.3px;
}

/* Takes whatever height is left under the copy, so text never overlaps the render.
   Scroll-zoom grows from the bottom edge, so it can't creep upward into the copy. */
.product-stage {
  position: relative;
  flex: 1;
  min-height: 0;
  margin: 24px 0 70px;
  transform-origin: 50% 100%;
  will-change: transform;
}

.product-stage canvas {
  display: block;
  width: min(1080px, 100%);
  height: 100%;
  margin: auto;
}

.stage-caption {
  position: absolute;
  right: 7.5%;
  top: 45%;
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.1px;
  color: #818188;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 120px;
  line-height: 1.6;
}

.caption-rule {
  width: 28px;
  flex-shrink: 0;
  height: 1px;
  background: #bbb;
}

.hero-bottom {
  position: absolute;
  bottom: 25px;
  left: 48px;
  right: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #88888f;
  font-size: 11px;
}

.hero-bottom p {
  margin: 0;
}

.scroll-cue {
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.scroll-cue > span {
  font-size: 20px;
  color: #34343b;
}

.replay {
  background: #e8e8ed;
  color: #43434a;
  border-radius: 30px;
  padding: 12px 20px;
  font-size: 13px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.replay:hover {
  background: #dddde3;
}

.replay span {
  font-size: 10px;
}

/* --------------------------------------------------------------------------
   Intro
   -------------------------------------------------------------------------- */
.intro {
  padding-top: 130px;
  padding-bottom: 150px;
  max-width: 1450px;
  margin: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 90px;
}

.intro .eyebrow {
  grid-column: 1 / -1;
}

.intro-description {
  font-size: 23px;
  line-height: 1.5;
  color: var(--muted);
  margin: 4px 0 0;
  letter-spacing: -0.5px;
}

/* --------------------------------------------------------------------------
   Playground — dark interactive section
   -------------------------------------------------------------------------- */
.playground {
  background: var(--dark-surface);
  color: var(--paper);
  padding-top: 105px;
  padding-bottom: 45px;
  overflow: hidden;
}

.playground .eyebrow {
  color: #96969f;
}

.demo-heading {
  max-width: 1200px;
  margin: auto;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}

.demo-heading > p {
  color: #a0a0a8;
  font-size: 18px;
  line-height: 1.5;
  margin: 0 0 5px;
}

.demo-surface {
  max-width: 1120px;
  height: 570px;
  position: relative;
  margin: -5px auto -15px;
}

.demo-surface canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.angle-readout {
  position: absolute;
  right: 0;
  top: 36%;
  margin: 0;
  font-size: 65px;
  font-weight: 300;
  color: #dedee2;
  letter-spacing: -3px;
}

.angle-readout > span:nth-child(2) {
  font-size: 34px;
  vertical-align: top;
  position: relative;
  top: 5px;
}

.angle-readout small {
  display: block;
  font-size: 10px;
  letter-spacing: 2px;
  color: #87878f;
  margin-top: 9px;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  max-width: 870px;
  margin: auto;
}

.presets {
  background: var(--dark-control);
  border-radius: 30px;
  padding: 5px;
  display: flex;
  gap: 2px;
}

.presets button {
  border-radius: 30px;
  padding: 11px 24px;
  color: #a8a8b0;
  background: transparent;
  font-size: 14px;
  transition:
    background 0.25s,
    color 0.25s;
}

.presets button[aria-pressed="true"] {
  background: var(--paper);
  color: var(--ink);
}

.angle-control {
  display: flex;
  align-items: center;
  gap: 17px;
  font-size: 12px;
  color: #aaaab2;
  flex: 1;
}

.angle-control input {
  width: 100%;
  accent-color: #e0e0e5;
  cursor: ew-resize;
  min-width: 100px;
}

.round-button {
  background: var(--dark-control);
  color: white;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  font-size: 25px;
  flex-shrink: 0;
}

.demo-note {
  text-align: center;
  font-size: 12px;
  color: #8d8d95;
  margin-top: 28px;
}

/* --------------------------------------------------------------------------
   Details
   -------------------------------------------------------------------------- */
.detail-grid {
  max-width: 1450px;
  margin: auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 65px;
  padding-top: 115px;
  padding-bottom: 135px;
}

.detail-icon {
  font-size: 39px;
  line-height: 1;
  color: #888c94;
  display: block;
  margin-bottom: 33px;
}

.detail-grid p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.6;
  margin: 0;
}

/* --------------------------------------------------------------------------
   Styles (one recorded take per style, a picker to swap them)
   -------------------------------------------------------------------------- */
.styles { background: var(--dark-surface); color: var(--paper); padding-top: 105px; padding-bottom: 95px; }
.styles .eyebrow { color: #96969f; }
.styles-heading { max-width: 1200px; margin: 0 auto 44px; display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; }
.styles-heading > p { color: #a0a0a8; font-size: 18px; line-height: 1.5; margin: 0 0 5px; }
.styles-display {
  position: relative; max-width: 1120px; margin: auto; aspect-ratio: 1512 / 982;
  border-radius: 18px; overflow: hidden; background: #000;
  box-shadow: 0 0 0 1px #ffffff14, 0 50px 100px -40px #000;
}
.style-clip { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.45s ease; }
.style-clip.is-active { opacity: 1; }
.styles-controls { max-width: 870px; margin: 36px auto 0; display: flex; flex-direction: column; align-items: center; gap: 18px; }
.styles-picker { flex-wrap: wrap; justify-content: center; }
.styles-picker button[aria-selected="true"] { background: var(--paper); color: var(--ink); }
.styles-caption { color: #a0a0a8; font-size: 16px; line-height: 1.5; margin: 0; text-align: center; min-height: 1.5em; }
.styles .demo-note { margin-top: 30px; }

/* --------------------------------------------------------------------------
   Settings (the popover, and what each control does)
   -------------------------------------------------------------------------- */
.settings { max-width: 1100px; margin: auto; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 72px; align-items: center; }
.settings-copy > p:not(.eyebrow) { font-size: 18px; line-height: 1.5; color: var(--muted); margin: 28px 0 34px; max-width: 46ch; }
.settings-list { margin: 0; display: grid; gap: 0; }
.settings-list div { display: grid; grid-template-columns: 200px 1fr; gap: 18px; padding: 14px 0; border-top: 1px solid var(--line); }
.settings-list div:last-child { border-bottom: 1px solid var(--line); }
.settings-list dt { font-size: 15px; font-weight: 600; letter-spacing: -0.2px; }
.settings-list dd { margin: 0; font-size: 15px; line-height: 1.5; color: var(--muted); }
.settings-shot { margin: 0; justify-self: center; text-align: center; }
.settings-shot img { display: block; width: 320px; max-width: 100%; height: auto; border-radius: 14px; box-shadow: 0 40px 80px -30px #0006, 0 0 0 1px #0000000d; }
.settings-shot figcaption { font-size: 13px; color: #86868b; margin-top: 18px; }

/* --------------------------------------------------------------------------
   Real world — photo
   -------------------------------------------------------------------------- */
.real-world {
  background: #eaeaec;
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 65px;
  align-items: center;
  padding-top: 95px;
  padding-bottom: 95px;
}

.real-copy h2 {
  font-size: clamp(40px, 4.2vw, 62px);
}

.real-copy p:not(.eyebrow) {
  font-size: 18px;
  line-height: 1.5;
  color: var(--muted);
  margin: 28px 0;
}

.real-world figure {
  margin: 0;
}

.real-world video {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 20px;
  display: block;
  background: #0b0c0e;
}

.real-world figcaption {
  font-size: 12px;
  color: #77777d;
  margin: 16px 0 0;
}

/* --------------------------------------------------------------------------
   Get iFold
   -------------------------------------------------------------------------- */
.get {
  text-align: center;
  padding-top: 135px;
  padding-bottom: 125px;
  background: #fff;
}

.app-icon {
  background: linear-gradient(135deg, #353b43, #111418);
  border: 1px solid #4d5156;
  box-shadow:
    0 6px 10px #0002,
    inset 0 1px 1px #ffffff5c;
  color: white;
  width: 86px;
  height: 86px;
  border-radius: 20px;
  display: grid;
  place-items: center;
  margin: 0 auto 32px;
}

.app-icon svg {
  width: 57px;
  height: 57px;
}

.get .eyebrow {
  letter-spacing: 1.5px;
}

.get h2 {
  font-size: clamp(50px, 5.5vw, 78px);
}

.get > p:not(.eyebrow):not(.compatibility) {
  color: var(--muted);
  font-size: 21px;
  margin: 25px 0 30px;
}

.compatibility {
  font-size: 12px;
  color: #86868b;
  margin: 24px 0 0;
}

.compatibility span {
  padding: 0 8px;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
footer {
  max-width: 1280px;
  padding: 34px 48px;
  margin: auto;
  display: flex;
  align-items: center;
  gap: 25px;
}

footer .brand {
  font-size: 20px;
}

footer p,
footer > span {
  font-size: 12px;
  color: #86868b;
}

footer > span {
  margin-left: auto;
}

/* --------------------------------------------------------------------------
   Dialogs
   -------------------------------------------------------------------------- */
dialog {
  border: 0;
  border-radius: 24px;
  padding: 48px;
  background: #fff;
  color: var(--ink);
  width: min(600px, calc(100% - 32px));
  max-height: 90svh;
  box-shadow: 0 30px 100px #0005;
}

dialog::backdrop {
  background: #0008;
  backdrop-filter: blur(12px);
}

dialog h2 {
  font-size: 40px;
  letter-spacing: -1.8px;
}

dialog h3 {
  font-size: 18px;
  margin: 25px 0 10px;
}

dialog p,
dialog li {
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
}

dialog li {
  margin-bottom: 8px;
}

dialog ul {
  padding-left: 18px;
}

.dialog-close {
  position: absolute;
  right: 16px;
  top: 16px;
  border-radius: 50%;
  background: #eeeef1;
  color: #63636a;
  width: 32px;
  height: 32px;
  font-size: 23px;
}

pre {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--paper);
  padding: 16px;
  border-radius: 12px;
  gap: 10px;
  font-size: 14px;
}

pre button {
  background: transparent;
  color: var(--accent);
  font-size: 13px;
}

.privacy-note {
  border-left: 2px solid #bbb;
  padding-left: 15px;
}

/* Setup dialog: download action and the numbered install steps */
.dialog-actions { margin: 26px 0 6px; }
.download-meta { font-size: 13px; color: #86868b; margin: 14px 0 0; line-height: 1.6; }
.sponsor-line { font-size: 14px; margin: 14px 0 0; }
.sponsor-line a { color: var(--accent); font-weight: 500; }
footer a.sponsor { color: var(--accent); margin-left: 10px; }
dialog .steps { list-style: none; padding: 0; margin: 0; counter-reset: step; }
dialog .steps li { position: relative; padding-left: 42px; margin-bottom: 18px; }
dialog .steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--ink); color: #fff;
  font-size: 13px; font-weight: 600; line-height: 26px; text-align: center;
}
dialog .steps strong { color: var(--ink); font-weight: 600; }
dialog .steps pre { margin: 12px 0 0; }
dialog pre code { flex: 1; min-width: 0; white-space: pre-wrap; word-break: break-all; line-height: 1.5; }
dialog p a { color: var(--accent); }

#video-dialog {
  width: min(1050px, calc(100% - 32px));
  padding: 20px;
}

#video-dialog video {
  width: 100%;
  height: auto;
  max-height: 75svh;
  aspect-ratio: 16 / 9;
  display: block;
  border-radius: 12px;
  background: #0b0c0e;
}

#video-dialog p {
  text-align: center;
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   404
   -------------------------------------------------------------------------- */
.not-found {
  min-height: 100svh;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 40px 24px;
}

.not-found h1 {
  font-size: clamp(48px, 7vw, 80px);
  letter-spacing: -3px;
}

.not-found p:not(.eyebrow) {
  color: var(--muted);
  font-size: 19px;
  margin: 20px 0 32px;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (min-width: 1600px) {
  .hero-copy {
    padding-top: 55px;
  }
}

@media (max-width: 900px) {
  .styles-heading { display: block; }
  .styles-heading > p { margin-top: 22px; }
  .styles-display { border-radius: 12px; }
  .settings { grid-template-columns: 1fr; gap: 44px; }
  .settings-shot { justify-self: start; }
  .nav {
    padding: 0 25px;
  }

  .nav nav {
    gap: 22px;
  }

  .hero-copy {
    padding-top: 50px;
  }

  h1 {
    font-size: 72px;
    letter-spacing: -4px;
  }

  .stage-caption {
    display: none;
  }

  .intro {
    column-gap: 35px;
  }

  .intro-description {
    font-size: 20px;
  }

  .demo-surface {
    height: 480px;
  }

  .angle-readout {
    font-size: 45px;
    top: 10%;
    right: 10px;
  }

  .controls {
    gap: 18px;
  }

  .presets button {
    padding: 10px 18px;
  }

  .detail-grid {
    gap: 32px;
  }

  .real-world {
    gap: 35px;
  }


  .demo-heading > p {
    max-width: 250px;
    font-size: 16px;
  }
}

@media (max-width: 600px) {
  .styles { padding-top: 65px; padding-bottom: 55px; }
  .styles-display { width: calc(100% + 48px); margin: 0 -24px; border-radius: 0; }
  .styles-picker button { padding: 9px 14px; font-size: 13px; }
  .settings-list div { grid-template-columns: 1fr; gap: 4px; }
  .nav {
    height: 66px;
    padding: 0 22px;
  }

  .nav nav > a:not(.button) {
    display: none;
  }

  .brand {
    font-size: 23px;
  }

  .button.small {
    font-size: 12px;
  }

  .hero {
    height: 155vh;
    min-height: 1030px;
  }

  .hero-sticky {
    min-height: 680px;
    height: calc(100svh - 15px);
  }

  .hero-copy {
    padding: 65px 15px 0;
  }

  .eyebrow {
    font-size: 10px;
    letter-spacing: 1.6px;
    margin-bottom: 22px;
  }

  h1 {
    font-size: clamp(36px, 9.6vw, 65px);
    letter-spacing: -2.2px;
    line-height: 1.06;
  }

  .hero-copy > p:not(.eyebrow) {
    font-size: 17px;
    margin-top: 22px;
  }

  /* Let the render bleed past the edges so the MacBook stays large */
  .product-stage {
    margin: 10px -90px 70px;
  }

  .hero-bottom {
    bottom: 25px;
    left: 22px;
    right: 22px;
  }

  .scroll-cue {
    font-size: 9px;
    letter-spacing: 1px;
    gap: 8px;
  }

  .replay {
    font-size: 12px;
    padding: 11px 14px;
    gap: 9px;
  }

  .mac-label {
    display: none;
  }

  .intro {
    display: block;
    padding-top: 90px;
    padding-bottom: 90px;
  }

  .intro h2 {
    font-size: 49px;
  }

  .intro-description {
    font-size: 19px;
    margin-top: 28px;
    line-height: 1.55;
  }

  .intro-description br {
    display: none;
  }

  h2 {
    letter-spacing: -2px;
  }

  .playground {
    padding-top: 65px;
    padding-bottom: 35px;
  }

  .demo-heading {
    display: block;
  }

  .demo-heading h2 {
    font-size: 49px;
  }

  .demo-heading > p {
    margin-top: 22px;
    max-width: 100%;
  }

  .demo-surface {
    height: 350px;
    width: calc(100% + 95px);
    margin: 15px -48px 0;
  }

  .angle-readout {
    right: 52px;
    top: 10px;
    font-size: 35px;
  }

  .angle-readout > span:nth-child(2) {
    font-size: 20px;
    top: 2px;
  }

  .angle-readout small {
    font-size: 8px;
    letter-spacing: 1.2px;
  }

  .controls {
    flex-wrap: wrap;
    gap: 22px 15px;
  }

  .presets {
    order: 0;
  }

  .round-button {
    order: 1;
  }

  .angle-control {
    flex-basis: 100%;
    order: 2;
    padding: 0 8px;
  }

  .presets button {
    padding: 11px 25px;
  }

  .demo-note {
    font-size: 11px;
    line-height: 1.5;
    margin-top: 24px;
  }

  .detail-grid {
    display: block;
    padding-top: 70px;
    padding-bottom: 75px;
  }

  .detail-grid article + article {
    margin-top: 50px;
  }

  .detail-icon {
    margin-bottom: 20px;
    font-size: 35px;
  }

  .detail-grid h3 {
    font-size: 24px;
  }

  .real-world {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding-top: 65px;
    padding-bottom: 50px;
    gap: 40px;
  }

  .real-copy h2 {
    font-size: 48px;
  }


  .get {
    padding-top: 85px;
    padding-bottom: 80px;
  }

  .get h2 {
    font-size: 52px;
  }

  .get > p:not(.eyebrow):not(.compatibility) {
    font-size: 18px;
  }

  .compatibility {
    font-size: 11px;
    line-height: 1.7;
    max-width: 250px;
    margin: 23px auto 0;
  }

  footer {
    padding: 30px 24px;
    gap: 15px;
    flex-wrap: wrap;
  }

  footer p {
    margin-left: auto;
  }

  footer > span {
    flex-basis: 100%;
    text-align: center;
    font-size: 11px;
    margin-top: 3px;
  }

  dialog {
    padding: 40px 25px;
  }

  dialog h2 {
    font-size: 35px;
  }
}

/* --------------------------------------------------------------------------
   Reduced motion — no scroll-driven animation, static hero
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero {
    height: auto;
    min-height: 0;
  }

  .hero-sticky {
    position: relative;
  }

  .button,
  .presets button {
    transition: none;
  }
}